http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_command_reference_chapter09186a0080087f36.html#1097851fair-queue (class-default)
To specify the number of dynamic queues to be reserved for use by the class-default class as part of the default class policy, use the fair-queue policy-map class configuration command. To delete the configured number of dynamic queues from the class-default policy, use the no form of this command.
no fair queue Det bruges til deaktivere QoS, sådan kort fortalt. Med Fair-queue kan du nemlig lave priotet på pakkerne.